Thanks Gaieus and Chris for the advice.
I was able to get tech support from Sketchup, followed their suggestions to uninstall Sketchup, reboot, and then reinstall Version 7, 8 or both. I reinstalled Pro 7, only, with "fingers crossed" that push/pull would work on that version, and I'd be back to normal.
Fortunately, my licensing info was back, my paint bucket tools were back, however, push/pull operation is now not functioning on Version 7! (Still just moving faces rather than extruding.) I updated my driver as suggestd, but it had no effect. I'm truly at wit's end! I've never had any issues before with regard to Vista. I never had any SU issues before installing Pro 8. (If I only had a time machine, haha)
Chris, I'm not sure what you mean about cleaning out the registry. (Once again, please forgive computer ignorance!) I've requested additional help from the Sketchup Tech support, and hope to be back in business (literally!!!) soon! Would you still recommend cleaning out the registry, even though "most of Sketchup" is back? Or do I risk wiping out valuable info?
Desperate here!! Thanks for your advice as always, and please forgive my late response. Just returned to town from a funeral.
BarbE